Aim: To investigate how the amount of light affects the growth of a type of plant.
Experimental Set-ups: one glass tank covered with tracing paper, another glass tank covered with black paper
Control Set-up: one transparent glass tank

Aim: To investigate how the amount of light affects the amount of bubbles formed in the water by a water plant
Changed variable: distance from the lamp
Constant variables: location of experiment, type of water plant, size of syringe, type of lamp used
Relationship statement: The further the lamp is from the water plant, the less bubbles formed in the water.

Aim: To investigate how the amount of light affects the amount of gas collected in the water.
Put tracing paper that allows some light to pass through
Changed variable: number of water plants
Constant variable: volume of water in the set-up, number of sheets of tracing paper, distance of water plants from the lamp
Relationship statement: As the number of sheets of tracing paper increases, the less bubbles formed in the water.

Photosynthesis occurs in green plants during the day but respiration occurs during the day and night